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3-26 TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual
–
May 2002 GFK-1541B
3
Example 2 Command Block–Example using a Network Address name
This example is the same as Example 1 except that the Network Address name of the remote host
(“PLC_1aa”) is used instead of its IP address. For more information on Network Address names,
see the chapter: “Network Administration Support”.
Establish a channel (Channel 7) to a remote host application server with a Network Address name
of “PLC_1aa”. Return the COMMREQ Status word to %R10. Send local PLC registers
%R50–%R57 to remote host. Repeat the send 10 times, once every 7 seconds, with a timeout of
500 ms for each transfer.
Dec (Hex)
Word 1 00045
(002D)
Length of Send Information Report Data Block (45 words)
Word 2 00000 (0000) Always 0 (no-wait mode request)
Word 3 00008 (0008) Memory type of CRS word (%R)
Word 4 00009 (0009) CRS word address minus 1 (%R10)*
Word 5 00000 (0000) Reserved
Word 6 00000 (0000) Reserved
Word 7 02010 (07DA)
Send Information Report Channel command number
Word 8 00007 (0007) Channel number (7)
Word 9 00010 (000A) Number of repetitions (send 10 times)
Word 10 00003 (0003) Time units for send period (3=seconds)
Word 11 00007 (0007) Minimum interval between host accesses (every 7 seconds)
Word 12 00050 (0032) Timeout on each individual transfer response (500 ms)
Word 13 00008 (0008) Local PLC - Memory type from which to send data (%R)
Word 14 00050 (0032) Local PLC - Starting address from which to send data (%R50)
Word 15 00008 (0008) Local PLC - Number of memory units (8 registers)
Word 16 00000 (0000) Reserved
Word 17 00000 (0000) Reserved
Word 18 00003 (0003) Remote Host - Network Address type (3=Symbolic Name)
Word 19 00032 (0020) Remote Host - Network Address length in words (32)
Word 20 19536 (4C50) Remote Host - Network Address name, char 1–2 (PL)
Word 21 24387 (5F43) Remote Host - Network Address name, char 3–4 (C_)
Word 22 24881 (6131) Remote Host - Network Address name, char 5–6 (1a)
Word 23 00097 (0061) Remote Host - Network Address name, char 7–8 (a )
Word 24 00000 (0000) Remote Host - Network Address name, char 9–10
Word 25 00000 (0000) Remote Host - Network Address name, char 11–12
Word 26 00000 (0000) Remote Host - Network Address name, char 13–14
Word 27 00000 (0000) Remote Host - Network Address name, char 15–16
Word 28 00000 (0000) Remote Host - Network Address name, char 17–18
Word 29 00000 (0000) Remote Host - Network Address name, char 19–20
Word 30 00000 (0000) Remote Host - Network Address name, char 21–22
Word 31 00000 (0000) Remote Host - Network Address name, char 23–23
Word 32 00000 (0000) Remote Host - Network Address name, char 24–25
Word 33 00000 (0000) Remote Host - Network Address name, char 26–27
Word 34 00000 (0000) Remote Host - Network Address name, char 28–29
Word 35 00000 (0000) Remote Host - Network Address name, char 30–31
Word 36–51
Reserved: set to zero
* Word 4 (CRS word address) is the only zero-based address in the Command Block. Only this
value requires subtracting 1 from the intended address.
The term
local PLC
is
used here to identify the
client PLC
—the PLC
that initiates the
communications
request.
The term
SRTP Server
is used here to identify
the
Host server.